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Product Detailed Parameters
- Description：IC LED DRIVER CTRLR PWM 16HTSSOP
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Controller
- Topology：SEPIC, Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s)：No
- Number of Outputs：1
- Voltage - Supply (Min)：4.5V
- Voltage - Supply (Max)：75V
- Voltage - Output：3V ~ 72V
- Current - Output / Channel：-
- Frequency：2MHz
- Dimming：Analog, PWM
- Applications：-
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-PowerTSSOP (0.173", 4.40mm Width)
- Supplier Device Package：16-HTSSOP
- Grade：-
- Qualification：-
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Overview
The LM3421MHX/NOPB is a constant current LED driver IC from Texas Instruments, designed for high-efficiency lighting applications. It supports boost, buck, and SEPIC topologies with an output current capability of 5 A. The device operates within a supply voltage range of 4.5 V to 75 V and delivers an output voltage between 3 V and 72 V. It features an adjustable switching frequency from 100 kHz to 2 MHz. The component is housed in a 16-pin HTSSOP package and functions reliably across a temperature range of -40°C to +125°C.
Feature Summary
- Supports multiple LED driver topologies including boost, buck, and SEPIC configurations
- Enables precise constant current control for N-channel MOSFET drivers
- Provides flexible dimming capabilities through analog and PWM interfaces
- Includes thermal shutdown protection for enhanced operational safety
Applications
- LED lighting driver circuits
- Constant current LED driver designs
- General illumination systems requiring adjustable frequency operation
Procurement Notes
Verify the specific suffix against official Texas Instruments documentation to confirm exact packaging and reel specifications. Ensure the ordering part number matches the required tape and reel configuration for automated assembly processes. Cross-reference the RoHS compliance status directly with the manufacturer's latest release notes to guarantee adherence to environmental regulations for your target market.
Selection Notes
Select this component when designing LED drivers that require support for various converter topologies such as boost or buck. It is suitable for applications needing high output current up to 5 A and wide input voltage ranges. Consider the adjustable frequency feature for optimizing electromagnetic interference performance. Verify that the HTSSOP-16 package fits the available board space constraints.
Part Context
This device belongs to the LM3421 series of LED lighting drivers manufactured by Texas Instruments. It is specifically engineered as an N-channel controller for constant current LED applications. The series provides solutions for efficient power management in lighting systems, offering flexibility in circuit design through configurable operating parameters and robust protection features.
Replacement Considerations
LM3421Q1MHX/NOPB: Automotive-grade variant with similar functionality.
FAQ
What switching frequencies are supported by the LM3421MHX/NOPB?
The device supports an adjustable switching frequency range from 100 kHz to 2 MHz.
Which LED driver topologies can be implemented using this IC?
The LM3421MHX/NOPB supports boost, buck, and SEPIC topologies for driving LEDs.
